Tour of Agent Protocols: MCP, A2A, AG-UI, A2UI

The session explores emerging agent protocols: MCP for tool/resource access, A2A for cross-platform agent communication, A2UI for UI generation, and AG-UI for frontend interaction. It explains how they complement each other and includes demos using frameworks like ADK to help build interoperable agents.

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Mete AtamelGoogle

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Friday, November 20, 12:25-13:05

Room 2 - Alexandros

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There are many emerging protocols around agents. Model Context Protocol (MCP) standardizes how models and agents access external tools and resources. Agent2Agent Protocol (A2A) defines how agents running on diverse frameworks and platforms communicate. Agent to User Interface Protocol (A2UI) defines how agents generate UI and Agent-User Interaction Protocol (AG-UI) defines how agents communicate with frontends. In this session, we’ll deep-dive into each protocol and show how they complement each other. As a bonus, we’ll also see demos on how to use these protocols in agent frameworks such as Agent Development Kit (ADK) to give you practical knowledge to start building your own interoperable agents.

agents

protocols

interoperability

frameworks

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Mete Atamel

Google

United Kingdom

I’m a Software Engineer and a Developer Advocate at Google in London. I build tools, demos, tutorials, and give talks to educate and help developers to be successful on Google Cloud.